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Guha, Lopamudra; Seenivasagan, T; Iqbal, S. Thanvir; Agrawal, O. P; Parashar, B. D
Parasitology research (1987), 10/2014, Letnik: 113, Številka: 10Journal Article
Human skin emanations attract hungry female mosquitoes toward their host for blood feeding. In this study, we report the flight orientation and electroantennogram response of Aedes albopictus females to certain unsaturated acids and alcohols found in human skin. In the Y-tube olfactometer, odors of lactic acid and 2-methyl-3-pentanol attracted 54–65 % of Ae. albopictus females at all doses in a dose-dependent manner. However, at the highest dose (10⁻² g), the acids repelled 40–45 % females. Attractancy (ca. 62–68 %) at lower doses and repellency (ca. 30–45 %) at higher doses were recorded for 3-methyl-3-pentanol and 1-octen-3-ol, while 5-hexen-1-ol, cis-2-hexen-1-ol, and trans 2-hexen-1-ol odor repelled ca. 55–65 % of Ae. albopictus females at all doses. Antenna of female Ae. albopictus exhibited a dose-dependent EAG response up to 10⁻³ g of L-lactic acid, trans-2-methyl-2-pentenoic acid, 2-octenoic acid, trans-2-hexen-1-ol and 1-octen-3-ol stimulations; however, the highest dose (10⁻² g) caused a little decline in the EAG response. EAG response of 9–10-fold was elicited by lactic acid, 2-octenoic acid, trans-2-hexenoic acid, and 3-methyl-3-pentanol, while cis-2-hexen-1-ol and trans-2-methyl pentenoic acid elicited 1–5-fold responses compared to solvent control. A blend of attractive compounds could be utilized in odor-baited trap for surveillance and repellent molecules with suitable formulation could be used to reduce the biting menace of mosquitoes.
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